Hello guys, I recently bought a GTX 560 Ti to begin my upgrade to my PC. I currently have a GTS 450 SLI set up too. My questions is that will it be more beneficial to use a set of GTS 450's in SLI plus the GTX 560 Ti as the physX processor or the GTX 560 Ti and a single GTS 450 as the PhysX processor? Is it possible to use the GTX 560 Ti as the main GPU and the SLI GTS 450's for PhysX by switching the cards around on the PCI-E slots? Which of these set ups are the best in terms of best overall FPS along with PhysX features? This will be a temp. set up until I could get a second GTX 560 Ti to SLI them and use a single GTS 450 for PhyX, I'd appreciate any help.

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I ended up selling one of the 450's and keep the other for PhysX. I just got my second GTX 560Ti and wow, does it make a big difference in Battlefield 3. With my GTS dedicated to PhysX, it helps a lot in intensive firefights with pieces of stuff flying around, lol. With my current setup, I ran the game at ultra settings and managed a modest 40 FPS average with about 60 being the highest and around 20 the lowest. Note that all the cards were at their reference clocks. I will now get into the fun of OC and will post the results in a bit. This game looks amazing on a 40" Sony Bravia tv @ 1080P.